Semenya, double Olympic and triple world champion over 800m and who completed the 800-1500 double at the Commonwealth Games this month, responded to the new rules on Twitter: “I am 97 per cent sure you don’t like me but I’m 100 per cent sure I don’t care.”

Athletics authorities have sought struggled to find a solution to the issue that respected the rights of Semenya while also providing what they says is a “level playing field”.

Other atletes believe she has an unfair advntage because of the high levels of naturally occurring testosterone in her body. But, under the new rules Semenya will either have to take prescribed medication to compete at her event or move to longer-distance running.

“We want athletes to be incentivised to make the huge commitment and sacrifice required to excel in the sport, and to inspire new generations to join the sport and aspire to the same excellence,” said IAAF President Sebastian Coe.

These new Regulations, approved by the IAAF Council in March, will come into effect from Nov. 1 2018.